Greetings to all interested parties. I can rate this product as completely poor quality. The chair is used by a regular user, even though it is praised as sturdy, after 2 weeks of use the seat control broke (took off the thread). Since the supplier is foreign, even though it looks like a Czech website that offers it, I did not file a complaint and repaired the chair. "the time devoted to the complaint and the costs would certainly be greater than the repair" :) Well, after another three weeks, the wheel broke.... one "I replaced"... the other in two days.... "I replaced "I would like to point out that the chair is not on the racing track, but on the beautiful new vinyl, and now I'm waiting to see what happens next :))). In conclusion, I do not recommend the chair, it is a shunt.